Mortar-mixer.



PATENTED DEC. 10, 1907.

.G. E. OBLMAN.

MORTAR MIXER. APPLICATION FILED JULY 10. 1907.

UNVENTORI WITNESSES:

R & fig mm UNITED STATES PATENT OFFICE.

OURT E. OELMAN, or DETROIT, MICHIGAN.

MORTAR-MIXER;

Specification of Letters Patent. Application filed Jul 10.1907. SerialNo. 382.982.

To fillv whom it may concern:

. Be it known that I, CURT E. OELMAN, a citizen of the United States ofAmerica, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful Improvements inMortararatus rigidly-while running as t e wheel use is restricted tokeep it within the customary limits for ordinary road use.

This lnvention relates to a mixer of the type described wherein thoroughand efficient commingling of thematerial used is ob- .;tained in alimited s ace, the parts being so disposed and engaged as to givestability and steadiness to the machine without affecting itsportability.

The invention consists in the matters hereinafter described, and moreparticularly set forth in the appended claims. In the drawings, Figure 1is a view in erspectiveof a machine embodying the catures of theinvention. Fig. 2 is a transverse section through the forward end of themachine parts being in elevation. v ews-in detail of a conveyer arm.Fig. 4 are views in detail of am'ixing blade. Fig.

'35 5 is a vertical central longitudinal section through the rear end ofthe machine.

Referring to the drawings, the body of the machine consists of ahorizontal r trough 1 of sheet metal closed at both ends. Its, forwarddischarge end is su ported by a cradlev consisting of oppositelydisposed metal brackets 2 whose upper divergent arms. are. concave tocorrespond to the shell of the trough to which they are riveted, and

4,5 whose lower, per endiculai'. parallel ends are severally securc( bybolts 3 ofr'the like, to parallel ribs 4 on the upper face of ahorizontal disk 5 The latter is rotatably secured by an annular'rabbetedflange 6 on a circular bolster plate 7 having de ending bearing blocks 8integrally formed t ereon, in which a forward wheelaxle 9 'is rotatablysecured by suitable caps 10 bolted tachably secured thereon. A

suitably secured to the bolster plate. The

regror hopper end of'the trough is mounted:

squared between the bearings an withdrawn through a suitable. aperture30 in Fig. 3 are U-shaped or otherwise de-" tongue 11 is Patented Dec.10,1901,

on a ribbed and flanged metal drop frame 12 whose upper portion 13' isu-sh'aped. to conform to and closely supportthe trough to which it issecured by rivets or bolts. The

depending portion forms a pedestal 15 with divergent legs whoseflangedends rest on and are secured to a horizontal,rearwardly-extending engine platform 16 by bolts 17 and angle braces 14.

The platform has integral, marginal flanges 18 in which alined axlestuds-19 are secured- I for the rear wheels 20.

. A. hopper 21 whose flared sides 22 are each riveted or bolted to theangle iron 23 which forms the flange rim of the trough, ermits;

material to be thrown into the bo y from either side, near the rear endthereof,

A segmental door 24 is hung on suitable hinges 25 to the front of thetroughand is locked by a latch 26.

A shaft 27 is rotatably secured inalinement withthe axis of curvature ofthetrough, by

an overhanging bracket 28 bolted on the front end of the trough and by abearing 29 on the rear end. The shaft is pol 'g'onal or may be .the'front b removing thebearing bracket 28. The s aft extends through therear bearing and a gear 32 is keyed or otherwise secured thereon.

An engine 33', of any, approved type, is mounted-on the. platform16,,and its drive gear 34 is operatively connected to.the shaft gearthrough an intermediate pinion 3 ,5, which is journaled on a .studcarried by a slide I block 36 secured b bolts engaging horizontal guideslots 37 int e pedestal 15 in the drop frame. This permits change andadjustment .of the pinion for obtaining'different speeds.

A number of conveyer arms 38 are secured on the shaft in helical orderbeneath the hopper. These arms each consist of a socket 39 adapted toslip onto the'shaft, a short shank 40 and a blade 41 integral therewith,setobliquely to the axis, turned to form a flange 42. These arms extendpast the hopper and are of sufficientpitch to move material receivedtherefrom quite ra idly toward the middle portion of the trough, withsuflicient stirring and rotary motion to with the rear margin upfthoroughly mix' the mass, which is usually'in adr state. J p 1 Theremainder of the shaft beyond the hopper carries mixing blades 43. Theseeach consist of a hollow socket 44, adapted to engage the shaft. and abroad, segmental blade 45, set obliquely thereon, whose forward edge hasa marginal flange 46, extending quite the length of the blade, while thesegmental margin and end of the flange very closely approach and sweepthe surface of the trough. These mixing blades have considerably lessrake or pitch than the arms and do not advance the material so rapidlyalong the trough, but turn it over and over with a grinding, rubbingmotion against the side of the trough, which insures smoothness andthorough mixture or blending of'the ingredients.

A water pipe 47 connected to any available source of supply, ishorizontally secured centrally over the middle portion of the trough andis adapted to spray the contents of the trough when first encounteringthe mixing blades;

One of the features of the invention is the arrangement of the conveverflight, whereby the material, as received om the ho per, is carriedquite rapidly along the troug 1, with sufficient rotary motion tothoroughly mix the mass, while dry, and then, while water is beingadded, is retarded and turned over and over, to thoroughly saturate itbefore it passes I beyond the water supply, and to rub it smooth,

so that any coarse particles are disintegrated and the resultant mixtureis homogeneous. This action of the blades especially adapts the machinefor mixing mortar and that is its principal purpose, as the mortar isthoroughly distributed uniformly throughout the mass.

Another feature is the distribution of the load on the Wheels, so thatthe vibrations of the engine are communicated directly to the rearwheels at a point below the center of gravity of the machine, therebydiminishing the tendency to'oscillations.

Another feature is the use of the broad horizontal bearing for the frontWheels,

whereby the usual king bolt is eliminated,

and the lateral strain carried at the circumference of the bolsterplate, thereby transmit ting the load as directly as possible to thewheels.

What I claim as-my invention is 1. A mixer comprising a horizontal U-shaped trough provided with a hopper delivering centrally into thetrough from either side, near one end thereof, and at the other end witha discharge door, a wheeled bolster and cradle supporting the dischargeend of the trough, a horizontally slotted dropframe carryin the hopperend of the trough, having a whee ed platform, a mixer and con J veyer inthe trough, a motor on the platform, and a gear train connecting the conveyer and motor having an intermediate pinion, a bearing block on whichthe pinion 1s journaled, adjustably secured by bolts in slots of thedrop frame;

2. A mixer comprising a horizontal U- shaped trough, supported bybearing wheels, a hopper over one end, a discharge door at. the otherend, a water spray pipe discharging centrally over an intermediateportion of the trough, a conveyer and. mixer consisting of a shaftjournaled at each. end in the trough, squared between its bearings,syumnetrieally disposed conveyer arms detachably secured on the portionof the shaft below the hopper, each consisting of a socket adapted toslide on the shaft, a shank and a segmental blade thereon oblique to theshaft provided with a marginal flange on its back edge, mixing bladessymmetrically disposed on the remainder of the shaft, each consisting ofa socket adapted to slip onto the shaft and a radial segmental bladethereon having less rake than. the conveyor arm blade, provided with amarginal flange on its forward edge, a

motor secured at the hopper end of the trough and a gear trainoperatively connect;- ing t ie motor and shaft;

3. A mixer comprising a U-shaped sheet metal trough, a hopper on therear end of the trough adapted to deliver centrally thereto from eitherside for a portion of its length, a discharge door in the forward end, ashaft bearing secured on the rear end of the trough, an overhanging.bearing bracket secured on the front end of the trough, a shaft having apolygonal body extending throu h the front end, journaled in the bracketan in the rear end bearing, symmetrically disposed oblique flangedconveyer arms detachably secured on the portion of the shaft below andadjacent to the hopper, oblique mixing blades having form whose driveshaft is in parallel alinement with the conveyer shaft, a gear securedto the conveyer shaft outside the rear hearing, a gear secured to themotor drive shaft,' an intermediate change pinion meshin .with saidgears, a stud block carrying said pinion, .adjustably secured by boltspassing throu h horizontal slots in the pedestal, and

a cradle supporting the forward end of the trough, swiveled horizontallyon a bolster late, and bearing wheels supporting the olster.

4. In a mixer having a U-shaped trough supported on bearing wheels andprovided with a hopper delivering into one end and a discharge door atthe other, a shaft having a polygonal body journaled at either end onthe trough ends in axial coincidence with the axis of curvature of thetrough, conveyor arms symmetrically disposed in helical relation on theshaft below the hopper, each con sisting of a hollow socket adapted. toslip onto the shaft body, a shank inte ral there. with and a short,broad segmenta blade integral with the'shank, oblique to the axis offlange on the forward edge of the blade' lying rotation,-= provided witha short. marginal in a plane parallel'to the shaft axis,the' seg.flange'on its rear edge, turned toward the dis-. mental margin andadjacent end-margin of char '0. door, and combined mixing and grind theflange being adapted to closely aiproach 15 5 ,i b adesdetachably'seeured'in symmetrical, and sweep the must face of 'the-tr'oushaft -bod each consisting of a hollow in presence of two witnesses.

socket em racing-thefshaft, a segmental OURT OELMAN.

blade integrally oined thereto at an angle Witnesses; 10 oblique to theaxis ofrotation, of less degree 0. YR. STIQKNEY,

he ieal relation along the remainder of the 'In testlmony whereof Iaffix my s1gnature.-'

than the angle of the arms, and a marginal OTTO F; BARTHEL

